Cooler



June 25, 1929. I Y MAMBQURG 1,718,372

COOLER Filed Aug. 18. 1925 Leopold Mambourg ATTU NEY.

----L 3 /0 T1 ra- INVENTUQ;

J aaa..-25, 1m-;

- UNITED sia-rE-sra'r m 'oFFIcE;

- moron) mamouaeg'or sarca m; c310,; assreuon. To run mnnnr-ownus v ingapparatus.

' SHEET GLASS OF; TOLEDO,'OHIQ; A. CORPORATION 01 OHIO.

, coonna.

1 Application filed August 1a, 1925; Serial 1%. 51 ,004.

i This invention relates to an improved form of cooler or bafile for usein a sheetglass draw-.

An objectof the present invention is 'to construct a cooler'that will,have a uniform cooling action on molten glass from which a sheet. may bedrawn.

Another object of the present invention is to improve the smoothnessof-the glass sheet with such acooler. A further object of the. inventionis to provide means for Bafiling and cooling heated air currentsescaping from the furnace and fire box. {Other objects and advantages ofthis invention become apparentfrom' thelfollowing detailed descriptionof one approved form of cooler.

' In 'the Oolb'urn process'of drawing sheet. glass,set forth in U.S..Pa'tent No.-1,248,809,.

is shown a pair of coolers; similar to those about to be described,having'flat bottoms directly exposed to the molten glasspassingthereunder but iii-spaced relation thereto.

These coolers-are constructed of thin sheet. metal having a coolingmedium circulated 2 thercthi'ough. It is found that-the metal of whichthese co'olers are constructed isfwavy. This Waviness of the metal inthe'bottoms of the coolers creates an uneven. cooling or heat absorbingaction on the molten glass passing thereunder, and it is beheved causesa perm-- gated appearance in a sheet drawn from this" i I 0 I o 1 Q a iQ tend toward building up individual groups" 3 quently vary in coolingintensity afiecting 7 .sectionof the cooler bottom absorbs heat fromglass. In order to remove the corrugations in the cooler bottoms, theywere filed or planed flat, but this caused some parts of the metal to bethinner than others, which had the same resultant efiect as thewavybottom,

namely, ununiform hcat'absorption.

' In the case of the ordinary coolen placed )closeto the glass surface,theu'nevennes's or. waviness of themetalin the bottoms would of aircolumns of varying height which-conse-' the glass. passingthereunderlnccordingly. By concaving or depressing the cooler bottoms, amore uniform cooling of the molten glass is attained-. It is believedthat tb'eheat absorbingarea of the concaved cooler'bottom, which is moreremote-than before, tends to break up or difiusethese individual groupsof air columns to the extent that no particular the sectionof moltenglass lying in the -same corresponding relationship 'the'r'eto, An.

equivalent cooling intensity will prevail with this improved bottom aswas necessary in the fiat bottom, only softer and considerably moreuniform.

Should any metal unevenness be apparent at the bottom-edges of theconcavity it can be removed by filing. or machining the edges straightand even, without materially afiecting. the metal thickness in thecooler. bottom.

A coolerthu's' constructed, having true-and smooth bottom edges, canbeadjusted to its lowest possiblenormal position without any partthereofcoming in contact with the mol-' ,ten glass thereunder.

This positioning of the cooler shields the glass sheet being drawn fromthe highly-heated gases escaping from the fur1 1aceorfi1'ebox.- y

It will' be noted in the drawing that a "greater heat absorbing area isattained with this improved bottom, without changing the general designof the coolers now in use.

It would be impossible to get the conditions In the accompanyingdrawing, :1 is a sectional elevation of a sheet drawing 'apparatus,showing the coolers in placeand in cross section. t

I Fig. 2 is a transverse vertical section on line 2-2 ofFig. 1, showingone of the coolers in sideelevation. r I, Fig. 1s an enlarged shown inposition.

' Figs. 4 and 5 are-sectioiuil views of niodifications of the cooler. i

i In Fig. .1 'of theidrawgipgs 6 is a receptacle supported on 'a fire-b7, and. is supplied section of the cooler with molten-fglass8 from thefurnace 9. -A

-. sheet of glass 10 is. drawn from the molten gla'ssfin the receptacleby the-drawin mechanism 11; Locatedat each side "of t e sheet and nearthe surface of the molten glass are the coolers 12 which serve toprotect the sheet from heated air currents escaping from the furnace'andfire-box, and at the same time absor'b s'ufiicien't. heat from the.glass passing thereunder to we it the proper' viscos ty to permit it tobe rawn awgy in sheet form.-

It'will be noted that' bot h coolers are iden J tical in structure, sofor the sake of briefness v only one cooler will be described. Thecooler is preferably made of sheet metaland is designed to form a'hollow elongated casing,

the sides -13-'being straight and preferably parallel. The bottom 14 ofthe casing is eoncaved or depressed inwardly, forming a cavity 15extending throughout the-length oi I the cooler. The bottom 14 should beof equal metal thickness throughout,

The transvcrsecontour of the cavity maybe arcuate,

parabolic, hyperbolic or angular, and islp're'ferably disposed evenlyWithin the side walls 13 of the casing, the deepest oint thereof lyingcentrally between.. The ottom edges 16 of the concavities are filedorlmachined off smooth and even. After. being filcd or machined ofifsmooth and even both edges should be parallel, preferably lie in thesame horizontal level plane and be' the same perpensuch as relativelycool water.

4 Any unequal'heat absorption caused .f'rom the metal waviness in theordinary cooler, having flat bottoms and located close to the 1 glasssurface, may be overcome by increasing the distance, between the coolerbottom and these heated gases and so preventtheir dan 1- aging action onthe' formation of the sheet."

It is to beunderstood that the form of the mvenlion'herewith showna'nddeseribed is to be taken as the preferred embodiment of the same,and that various changes-in the shape,

size and arrangement of parts may. be resorted to without departingfrom-the spirit of the invention or the scope of the subjoine'd' claimsjClaims:.

1. A cooler of the class described, compris- .ing a casing, sidesextending below the bot tom of said casing-ands; means of directing acooling mcdium'tln'ough the. casing.

2. A cooler of'the class described, comprising an clongatcd casing,-anda bottom having-J5 a .concavitydisposed between the side walls ofthecasing.

3. A coolerof'the class described, comprise.

in gun elongated casing, and a bottom having. a plane angulardepression-d sposed between 80v the sidewallsofthe casing. 4. A coolerof the class described for use in sheet glass drawing apparatus,comprising a casing and a bottom havin a conc'avity dis- -posed betweenthe side walls; of the casing, --said bottom being continuously cooled.4

the glass'surface, and then adding longitudi-Yprising a receptaclesupplied with molten nal side wall extensions. 22, shown in Fig. 5

- of the drawing, extendingdownwardly to the' level previouslymaintained by the cooler bottom. It will be noted-that a cooler bottomofthis construction maintains an air .column of equal heightwithin the.space 23 cooler bottom 14. It may beiound that this modification willfunction somewhat in the same manner as the cooler. covered 'in-the mainembodiment of this invention. a

'In operation, the molten' glass flows from the furnace and fills. theshallow glass drawing' receptacle. A relatively small area of thesurface glass about the -center of the receptacle is exposed to theatmosphere, and is further cooled uniformly, by the depressed 8.Acoolerof the charact bottoms of the coolers just described, placed atthe outer extremities thereof. It is from this uniformly; cooledareathat a sheet of glass of greater smoothness 1s drawn. Be'-' glass,means'to draw a sheet therefrom, and a cooler arranged at each side ofthe sheet, said. coolers having bottoms remotelyextending from, and sidewalls extending downto, the nmltenglass. I

6.' In a sheet glass drawing apparatus,'a cooler of the class described,comprising a 5. Ina sheet'glassdrawingapparatus,com

substantially rectangulmrcasing, a bottom depressed within'the sidewalls, the depres-- sion extending throughout the length of said 7Acooler of the character described-, co1n prising an elongated casing,and'a'. concavity in its bottom wall extending substantially from oneside edge thereof to the other. W p

' e1 described, comprising an elongatedcasiughaving a trans-. verse-1y'concaved bottom. 4 9. In sheet 'fglassapparatus, a-reeeptaclecontaining a suply of molten glass, and a casin'g.,the edges of thecasing. beingflat and ginning at the time when 'thefraw'materials coolerarranged-t ereabove, said cooler comare put into thefurnacetheglass isunder the prising a casing provided with a concavity in e 1 influence ofheat in some degree orother.

-From beneath the receptacle and' from the furnace very highly heatedgases escape, and it'ishere wherefthe coolers just described efiicientlyfunction again to bathe and cool its bottom-wall exposed to the moltenglass. Signed'at Lancaster, in the count of Fairfield, and-Stateof,Ohio, this lOt day of Augl lst, 1925.

' LEQP OLD

